WAM® AL II LW – Lightweight

The newest addition to the WAM® AL II Family of products, WAM® AL II LW, is a Lightweight refractory castable designed to provide significant insulating capability at a reduced weight; all while remaining non-reactive and non-wetting to molten aluminum metal.  Like all the WAM® AL II Family products, the Lightweight version is never degraded by penetration of metal nor subsequent formation of corundum within the refractory.


Transport vessels such as ladles are ideal application areas, where one desires to limit the overall weight of the vessel while maximizing its efficient thermal profile and the refractory's inertness to molten aluminum.  WAM® AL II LW is also ideally suited for furnace roofs, upper sidewalls, doors, and as a backup lining.  It has a density lower than molten aluminum, which allows opportunities for the material to be used as floats or other similar refractory devices as well.


The weight of refractory required to line an area with WAM® AL II LW is significantly less than standard dense castables commonly used, thus allowing for your furnace to have the most efficient lining design possible. WAM® AL II LW used in combination with the WAM® AL II Family of products, allows for the design of your vessel's refractory lining to provide toughness where needed and thermal efficiency where desired, all of course with the non-wetting inertness standard to the WAM® AL II Family of products.


Typical Technical Data

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Classification:Special Cement Castable
Placement Method:Vibration Casting
Available Application Packages:This product is specifically designed for aluminum contact application
Typical Water Requirement (%wt):30
Material Required for Estimating:66 (lb/ft³) or 1057 (kg/m³)
Maximum Recommended Service Temperature:2800 (°F) or 1538 (°C)


Calculated wt.% Based on Common Oxides
Aluminum Oxide (Al2O3):77 %750°F2.6
Silicon Dioxide (SiO2):0.3 %1470°F2.3
Titanium Dioxide (TiO2):0.1 %2200°F2
Iron(III) Oxide (Fe2O3):0.1 %  
Calcium Oxide (CaO):11.9 % (W/m K) 
Magnesium Oxide (MgO):0.2 % 400 °C 0.38
Combined Alkali Oxide (Na2O + K2O):0.3 % 800 °C 0.33
Other:10.0 % 1200 °C 0.28


Modulus of
Rupture (psi)
Cold Crushing
Strength (psi)
Linear Change (%)
After 23072200960n/a
After 150066110510-0.1


Modulus of
Rupture (MPa)
Cold Crushing
Strength (MPa)
Linear Change (%)
After 11011531.386.62n/a
After 150010570.763.52-0.1

Additional technical data may be available. Please contact your sales representative for more information.

Data on this table represent typical properties and cannot be used for specification purposes.